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Optimal beamforming in MISO cognitive channels with degraded message sets
Dresden University of Technology. (Communications Laboratory)
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
Dresden University of Technology. (Communications Laboratory)
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0001-9307-484X
Vise andre og tillknytning
2012 (engelsk)Inngår i: Wireless Communications and Networking Conference (WCNC), 2012 IEEE, IEEE Communications Society, 2012, s. 538-543Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this paper we consider the coexistence of a single-input single-output (SISO) primary link with a multiple-input single-output (MISO) secondary user pair that has non-causal knowledge of the primary message. We study an achievable rate region that exploits this knowledge by combining selfless relaying to maintain the rate supported by the primary link with dirty paper coding to pre-cancel the interference at the secondary receiver. We find the optimal choice of power allocation between these operating modes at the secondary transmitter as well as the optimal beamforming vectors. Moreover, we address the robustness of the solution to uncertainties in the channel knowledge. Finally, we show by numerical evaluation the gains obtained due to the additional knowledge of the primary message.

sted, utgiver, år, opplag, sider
IEEE Communications Society, 2012. s. 538-543
Serie
IEEE Wireless Communications and Networking Conference. Proceedings, ISSN 1525-3511
Emneord [en]
Beamforming, Computer simulation, Wireless telecommunication systems
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-51501DOI: 10.1109/WCNC.2012.6214426Scopus ID: 2-s2.0-84864339724ISBN: 978-146730437-5 (tryckt)OAI: oai:DiVA.org:kth-51501DiVA, id: diva2:464303
Konferanse
IEEE Wireless Communications and Networking Conference, WCNC 2012; Paris; 1 April 2012 through 4 April 2012
Forskningsfinansiär
ICT - The Next Generation
Merknad

QC 20120905

Tilgjengelig fra: 2012-11-14 Laget: 2011-12-13 Sist oppdatert: 2013-10-01bibliografisk kontrollert

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Thobaben, Ragnar

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